NuGet restore should log redirects

[zivkan]

To aid HTTP request error debugging, particularly for teams implementing the NuGet servers, it would be helpful to log the URL that generated the error, when the original request results in an HTTP redirect.

Currently:

Unauthorized https://api.server.test/v3/package/package_id/package_id.1.2.3.nupkg 0ms

Proposed:

Unauthorized https://api.server.test/v3/package/package_id/package_id.1.2.3.nupkg -> https://blobs.server.test/package_id/package_id.1.2.3.nupkg 0ms

Notes:

This longer log line should not happen unless the final response URL is different to the original requested URL. This means that HTTP responses where there is no redirect should remain the same as today's log output.

NuGet should remove secrets from the URL, where possible. If the URL contains HTTP Basic auth, in the form of https://user:pass@server.test/, the user:pass should be stripped from the log. Also consider masking query parameters (not removing, because it's important when debugging to know the parameter was there or not), such as sig(nature)?$|tok(en)?$|ticket$|auth